Agree that this is bad behavior and we need to find a solution. I'm guilty of self voting comments sometimes, so not saying I'm above the behavior. Sometimes as a minnow, self voting is the only way to get your comment to the top and be seen on a busy post such as this one.
The second issue that also should be addressed is bot auto-voting for your posts/comments. Even if it's not you self-voting, if it's your significant other or bot, then it's the same thing.